gamezbd browser webshop help

i bought the awakening weapon coupon to re-roll. and when the transaction went through i recieved my first one but the browser slowed down so i tried to refreshed it and go back. it bought a second awakening coupon when i realized what had happened. what can be done? due to external browser problem outside of game? i lost out on 10k kakao cash.

thanks

 

Send me a private message that includes a screenshot of your purchase history, and your account name. If you've used the item, you will not receive a refund.